Harrow



(No Model.)

H. R. BURGER 8# J. B. SIMPSON.

HARROW.

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ATTORNEYS.

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UNITED STATES PATENT OFFICE.

HENRY R. BURGER AND JOSEPH B. SIMPSON, OF FINCASTLE, VIRGINIA.

HARROW.

SPECIFICATION forming part of Letters Patent No. 255,934, dated April 4,1882.

Application tiled January 31, 1882.

To all whom -it may concern:

Be it known that We, HENRY R. BURGER and JOSEPH B. SIMPSON, ot'Fincastle, in the county of Botetourt and State ofVirginia, haveinvented a new and Improved Harrow; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming a part ot' thisspecification, in which- Figure l is a plan view ot' our improvedharrow. Figs. 2 to 8, inclusive, are detail views of the same. i

Our invention relates to improvements in harrows; and it consists in thepeculiar construction and arrangement of the parts, as hereinafter morefully set forth.

In the accom panying drawings, a a represent the outer barrow-beams ofour square form of barrow, to which the barrow-teeth are secured. Thereare four such harrow-beams, a a, in our construction, ofthe samelength,and each beam is formed of angle-iron, with the flange b ofthe angleironprojecting upwardly on the outer edge of each beam, as shown clearlyinFigs. l and 8, whereby the barrow-beams are rendered stronger andlighter than in the ordinary construction of barrow-beam. The ends ot'each barrow-beam aare provided with holes c, adapted to receive thehooks d, projecting upwardly from the opposite corners of the triangularmetallic blocks, each provided with a central longitudinal socket ortube, e, extending its entire length, into which is inserted anadjustable rod, i, which passes thence through a hole, lc, in a tlange,o, projecting downwardly from the metallic plate l, provided with aseries of adjusting-holes, m m, into any one of which the threaded bentinner end, n, of the rod t may be inserted and secured in place by thenut p. The inner end of each plate lis formed into adownwardly-projecting hook, q, each of which engages with the side of acentral hole, r, made in a metallic block, s, arranged at the center ofthe barrow.

t t represent clevises, each secured to the outer ends of two of therods t', lying in line with each other and parallel to the planes of thebarrow-teeth, hereinafter described.

(No model.)

u represents pins passing through holes in the rodst' to bold themetallic blocks hin place thereon, and c represents a barrow-toothinserted in one of the plates l, near the center of the barrow, toprevent it from sagging down at the center.

In the normal condition of the barrow the four beams a form a square,all the sides heilig equal and all the angles right angles, and thecentral arms, it', intersect each other at the center of the harrow, andare at right angles to each other and equal.

It' it be desired to Widen the barrow in one direction, it can readilybe accomplished by adjusting the inner ends of the rods 'i along theline in which the harrow is to be widened and placing them in holes mnearer the outer ends ofthe plates I. As the beams a are constant or ofthe same length, this adjustment will require a shortening orcorresponding decrease in the length of the central beams, l i, at rightangles to those lengthened.

By the above-described construction it will be seen that the outerbarrow-beams are pivoted to each other at their ends, and that thecentral adjustable beams are also, in effect, pivoted to each other atthe center of the harrow, and also to thejouter beams, by whichconstruction all the parts of the barrow in its movements in anydirection will conform to the undulations ot' the ground.

a represents a t0oth-holder composed of a short piece of angle-'ironhaving a ilat upper plate, a, provided with a hole, a3, andadownwardly-projecting ange, a2, having a hole, a. The tooth-holders a'are each secured to `the under faces of the beams a, parallel to eachother in the line of draft, by means of a bolt, b', threaded at itsupper end, which passes through the hole a in the tooth-holder and acorresponding hole in the beam a, and is lsecured thereto by a nut, b2.

A represents our improved triangular metallic harrow-tooth,the triangleforming the tooth being a scalene one, or having its sides c d e' ofunequal lengths, so that the angles of the triangle are different.

h 'i' l represent holes made in the harrowtooth above the middle of eachside of the y cutting-edge of the triangular tooth A can be y inclinednut b2.

further increased or diminished by means of a wedge, m', having acentral opening for the passage of the bolt b', inserted between theupper face of each tooth-holder and the beam a, and a lwedge-shapedwasher, a', lying in an opposite direction from the other wedge, andhaving a central hole for the passage of the bolt b', secured in placeby the nut b2. The function of the wedge-shaped washer n is to give afirm bearing to the lower facing of the It will ybe observed that innarrowing or Widening lthe barrow in a direction at right angles to theline of draft the barrow-teeth will be brought nearer together orfarther apait,

I dependent on the character of the soil to be metallic plates l, havingperforated flanges o, adjusting-holes m, and hooked inner end, q, blocks, having a central orifice, if, and adjustable rods t', substantiallyas described, and for the purpose set forth.

2. As an improved article of manufacture, the scalene triangularbarrow-tooth A, having its sides c' d c of different lengths and itsangles different, and provided with the holes h t" l above the middle ofeach side of the tooth, as set forth.

3. The combination, with the triangular harrow-tooth A, constructed asset forth, of the toothholder a', with hole 0.3, and downwardly'projecting ange a2, with hole a4, to which the tooth is secured, andbolt b', by which the holder is secured to theI harrowbeam,substantially as described, and for the purpose set forth.

4. The combination, with the triangular harrow-tooth A, tooth-holder a',both constructed as set forth, and. beam a, of the wedge m',Wedge-shaped washer n', bolt b', and nut b2, substantially as described,and for the purpose set forth.

5. The combination of the barrow-beam a, triangular barrow-tooth A,having its sides of unequal length and provided with holes i' hl,tooth-holder a', having flange a2 and holes a3 a4, bolt b, and nut b2,substantially as described, and for the purpose set forth.

H. R. BURGER. JOSEPH B. SIMPSON.

Witnesses:

CHAs. A. IEfrrrr, SoLoN U. KnMoN.

